Spinning bobbin and holder for rayon spinning machines



T. GRAUER Aug. 11, 1942.

iled April 15, 1938 N\ a N x My llll ll m N Patented Aug.ll, 1942 ISPINNING BOBBIN AND HOLDER FOR BAY ON SPINNING MACHINES Theodor Grauer.Horn, Thurgau, Switzerland, assignor to the firm Feldmuehle A. G. vorm.Loch;

Rorschach,

Schoenfeld & Co. Switzerland Application April 15, 1938, Serial No.202,341 In Germany March 3, 1937 14 Claims.

This invention relates to bobbins and holders therefor.

Known bobbin holders must be placed in the bobbin with little play, withdisadvantageous results in that-the holder grips the bobbin tightly sothat the wound rayon cannot be removed without damage or at any rateonly with difficulty. tween the bobbin and the holder then the bobbinhas, during its rotation, no fast grip and thus knocks,'runseccentrically and even rebounds.

The present invention discloses a novel form of bobbin in combinationwith its holder, which makes it possible for the bobbin to be secured onthe holder with a determined amount of play, but nevertheless ensuringan absolute fast grip of the bobbin thereon, so that the latter canneither knock nor move centrifugally.

A bobbin holder for artificial silk spinning ma chines according to theinvention is characterised in that the inner sleeve of the holder isconstricted near its central part like a cylindrical handle and thebobbin is secured to the holder by means of cams one of which isyielding, oneseries of cams being pressed against a rear cylindricalpart and the other against a forward conical part of the bobbin.

It is an object of the present invention to provide an economical,efflcient and practical bobbin and holder therefor, both bobbin andholder having cooperating means whereby the bobbin is frictionallysecured on the holder to assure good grip of the bobbin thereon and atthe same time providing the required play therebetween to enablerelative separation of bobbin and holder.

. This and other objects and advantages will become more apparent fromthe following description taken in connection with the accompanyingdrawing" in which:

Fig. 1 is a longitudinal section through the bobbin and holder on theline I--| of Fig. 2,

If, on the other hand, play is left bele engageable with and resting onthe end ings 10, Id, respectively. The end portions l9, l9a

of the two-armed lever 5 from projection too far outwardly. The cams}and 9 have respective bevelled surfaces H and I2 in order that theystruction of the outer sleeve frame lb, irrespective whether or not arigid or an e'xpansible bobbin I be concerned. Said frame which forms askeleton sleeve, comprises the longitudinal bars of said sleeve Ia aretapered or converge towards the center part lflb of said sleeve andterminate at each end thereof in a cylindrical or approximatelycylindrical section I90, I9d. This construction of the inner sleeve laensures, in combination with the co-operating bobbin holder 4 a secureholdingmeans for bobbin 1. The cam 8 of the lever 5 of the bobbinholder4 (Fig. 1) presses against the inner cylindrical section l9c of thebobbin sleeve 1a while the other cam 9, adjacent, the free end of holder4, engages the bobbin sleeve la at the end portion l9 of sleeve Ia andso urges it towards the shaft 3., This latter cam 9 protrudes only sofar from the holder 4 that it contacts with the converging end portionl9, while sufficient space is left for the bobbin 1 to be taken hold ofwith the hand by the spin- -nerfor the purpose of removing it. Inapplying the bobbin to the holder heretofore, it has been usual for .thebobbin to be pushed along the'holder4 until further movement of saidbobbin is resisted. This resistance or stoppage of movement occurs whenthe bobwhich latter flgure is a cross section of the same spring 6 oneend of which projects within bore 5a of lever 5 whereas the other end ofwhich rests with said attachment 4. The two cheeks or cams 8 and 9 ofthe lever 5 extend through corresponding slots 8a, 9a of the hollowcylinder attachment 4 and press outwardly against the sleeve la of thebobbin 1. The bridge It on the cylinder attachment 4 prevents the saidcams bin edge [1 (Fig. 1) comes intocontact with a suitable abutment ofthe bobbin holder. produces the serious disadvantage that theusually'well polished or varnished edges of the bobbin become damaged bythese contacts and per? 'mit the thread to slip ofl. The presentinvention aims at preventing this and, to,this end, the'partsf I6, 20and 2| of the 'bobbin 1 and of the holder 4 which? come into contactwith one another, are located when assembled, within the bobbin and sonever come into contact with the silk thread.

The endeavour to protect the edges I3 and I4 I and keep them alwayssmooth and undamaged, so that the thread wound between them in a knownmanner is (I 5, Fig. 1). not injured, has

further led to the provision of auxiliary edges. l1, IS. The bobbin canthen'be stood up on these This edges l1, l8 respectively, and not on theedges II, M. Damage of the auxiliary edges cannot harm the thread. Thereal edges l3 and I4 are thus protected and remain always smooth and thespinning of the. silk can proceed without or be projected forwardlyEspecially cam 9 pre-.

ventsthis forward movement, since it presses on the inner convergingseating surface provided on end portion l 9.

According to the invention, bobbin 1 is held by yielding,'pressuremembers or cams 0, 9 and also by the forwardly disposed rigid pressuremembers or cams b, b.

- Hollow attachment 4 has two inwardly projecting lugs a: to limitlateral movement of U- shaped member or lever therewithin.

Having thus described the invention what is claimed as new and desiredto be secured by Letters Patent, is:

1. A device of the character described comprising in combination abobbin for artificial silk, and a holder for said bobbin, said bobbinincluding a sleeve having an inner surface, said surface being providedwith a cylindrical intermediate part and a substantially outwardlyflaring end portion extending from either end of said intermediate part,said holder including cam means frictionally engageable with saidsleeve, at least one of said cam means being yieldably supported in saidholder so as to engage one of said end portions when said holder isinserted through the other of said end portions into said sleeve.

2. A device of the character described comprising in combination abobbin for artificial silk, and a holder for said bobbin, said bobbinincluding a sleeve having an inner surface, said surface being providedwith a cylindrical intermediate part, a substantially outwardly flaringend portion extending from either end of said intermediate part, and acylindrical section at the end of each flaring end portion, said holderincluding spaced apart series of cam means frictionally engageable withsaid sleeve, at least one of said cam means being yieldably supported insaid holder so as to engage one of said end portions when said holder isinserted through the other of said end portions into said sleeve, saidone of said cam means being seated with the other of said series of saidcam means on said cylindrical section at the end of said other of saidend portions.

3. A device of the character described comprising in combination abobbin for artificial silk, and a holder for said bobbin having a freeend, said bobbin comprising a sleeve having an inner surface, saidsurface being provided with an intermediate art and a substantiallydiverging end portion extending from either end of said intermediatepart, said holder comprising an intermediate part, and means at eitherend of said intermediate part of said holder, said means beingfrictionally engageable with said sleeve, at

from within said holder so as to engage one of said end portions of saidsleeve when said holder is inserted through the other of said endportions into said sleeve.

4. A device of the character described comprising in combination abobbin for artificial silk, and a holder for said bobbin comprising asleeve having an inner surface, said surface being provided with asubstantially cylindrical intermediate part and an end portion includinga substantially cylindrical section adjacent the outer end of each endportion, said end portions substantially converging from said outer endstoward said intermediate part, said holder comprising an intermediatepart, and a series of cam means at either end of said intermediate partof said holder, said can'r means being frictionally engageable withsaid-sleeve, at least one of said cam means of one of said series beingyieldably 20 held at said holder and engageable with one of said endportions when said holder is inserted through the other of said endportions into said sleeve and seated with the other of said series ofsaid cam means on said cylindrical section at the end of said other ofsaid end portions. I

5. A device of the character described comprising in combination abobbin, and a holder for said bobbin, said bobbin including a sleevehaving an inner surface, said inner'surface being provided with anintermediate part and an end portion diverging from either end of saidinterleast one of said means being yieldably projecting mediate part,each of said end portions being provided with a cylindrical section atthe free end thereof, said holder comprising an intermediate part, andmeans at either end of said intermediate holder part, said means at oneend of said holder part being frictionally engageable with one of saidend portions of said sleeve, said means at the other side of said holderpart being frictionally engageable with said cylindrical section of theother end portion of said sleeve.

6. A device of the character described comprising in combination abobbin, and a holder for said bobbin, said bobbin including a sleevehaving an inner surface, said inner surface being provided with anintermediate part and an end portion diverging from either end of saidintermediate part, each of said end portions being provided withcylindrical sections at the free end thereof, said holder comprising anintermediate part, and means at either end of said intermediate holderpart, said means at one end of said holder part being frictionallyengageable with one of said end portions of said sleeve, said means atthe other end of said holder part be- -ing frictionally engageable withsaid cylindrical section of the other end portion of said sleeve, one ofsaid means at one end of said holder part and at the other end of saidholder part being resiliently Journaled thereat.

7. A device of the character described comprising in combination abobbin, and a holder for said bobbin, said bobbin including a sleevehaving an inner surface, said inner surface being provided with anintermediate part and an end portion divergingly extending from eitherend of said intermediate part, each of said end portions being providedwith a cylindrical section at the free end thereof, said holdercomprising an intermediate part, and means at either end of saidintermediate holder part, said means at one end of said holder partbeing frictionally engageable with one of said end portions of saidsleeve, said means at the other end of said holder part beingfrictionally engageable with said cylindrical having a sleeve providedwith frictionalJy engageable portions at the inner surf-ace thereof,said section of the other end portion of said sleeve, one of said meansat one end of said holder part,

and an adjacent means at the other end of said holder part projectingboth from within said holder and being resiliently supported there-'within.

8. A device of the character described comprising in combination abobbin, and a holder for said bobbin, said bobbin including a sleevehaving an inner surface, said inner'surface being provided with anintermediate part and an end portion divergingly extending from each endof said intermediate part, each of said end portions being provided witha cylindrical section at the free end thereof, said holder comprising,an intermediate part, and friction means at each end of saidintermediate holder part, said friction means at one end of said holderpart being engageable with one of said end portions of said sleeve, saidfriction means at the other end of said holder part being engageablewith said cylindrical section of the other end portion of said sleeve,one

of said means at one end of said holder partand an adjacent means at theother end of said holder part being interconnected within said holderand protruding with their free ends through respective openings of saidholder for engagement with one of said end portions and said cylindricalsection of'the other end portion of said sleeve, respectively.

9. A device of the character described comprising a bobbin forartificial silk, said bobbin being provided with a sleeve having at itsinner surface end portions substantially diverging from the centerpart'of said surface toward the ends thereof, a holder for said bobbin,and spaced apart series of cam means in said holder for frictionalengagement with said sleeve surface,

ing end portions at the inner surface thereof, a

cylindrical section at each end of said end portions, a hollow holderfor saidbobbin projectable within said sleeve and frictionallyengageable within said sleeve, and spaced apart series of cammeans atsaid holder for engagement with one of said cylindrical sections andwith one of said slanting end portions, respectively, at least two camsof each series being rigidly connected with said holder.

11. A device of the character described com-v I prising a bobbin forartificial silk, said bobbin portions substantially converging from eachend of said surface toward the center part of said surface, a holder forsaid bobbin for coupling with said sleeve at said inner surface, andspaced apart series of coupling means projecting from said holder andpositioned thereat so asto assure respective engagement of said couplingmeans with said sleeve portions, said coupling means of each seriesbeing symmetrically disposed with respect to the circumference of saidholder.

12. A device of the character described comprising a bobbin forartificial silk, said bobbin having a sleeve provided with frictionallyengageable portions at the inner surface thereof, said portionssubstantially converging from each end of said surface toward the centerpart of said surface, a bobbin holder for coupling with saidsleeve atsaid inner surface, and spaced apart series of coupling means projectingfrom said holder and positioned thereat so as to assure respectiveengagement of said coupling means withsaid sleeve portions.

13. A device of the character described comprising a bobbin forartificial silk, said bobbin having a. sleeve provided with africtionally engageable inner surface, said surface being substantiallyslanting from each end thereof toward its center, a bobbin holder forcoupling with said sleeve at said irmer surface, and spaced apart seriesof coupling means projecting from said holder and positioned thereat'soas to assure respective engagement of said coupling means with saidsleeve surface.

14. A device of the character described comprising a bobbin forartificial silk, said bobbin having a sleeve provided with substantiallyslanting end portions at the inner surface thereof, a cylindricalsection at the free end of each end portion, said portions extendingfrom said sections, respectively, toward the center of said surface, aholder for said bobbin projectable within said sleeve and engageabletherewith, and spaced apart series of cam means at said holder forfrictional engagement with one' of said cylindrical sections and one ofsaid slanting end portions, respectively, one cam of each series beingresiliently supported in said holder, each of said cam means of oneseries being provided with a cylindrical surface portion, while each ofsaid cam means of another series being formed with a conical surfaceportion, whereby upon engagement of said holder with said bobbin, saidcam means of said one series contact with said one of said cylindricalsections and said cam means of said other series contact with said oneof said slanting portions.

'IHEODOR GRAUER.

